Table With Extendable Top

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Solution Overview

Problem

There is a need for a folding table that can be extended or retracted to different lengths while remaining simple, lightweight, and inexpensive, as existing extendable table top features add considerable weight, complexity, and cost.

Innovation Solution

The design includes a table frame with longitudinal and transverse frame rails, movable table tops with sliding tracks, and a table leaf that can be positioned between the table tops to extend or retract the overall length, using molded plastic surfaces and foldable legs for versatility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If extendable table top features are added to allow the table top to be extended or retracted to different lengths, then the adaptability of the table is improved, but the weight, complexity, and cost of the table increase considerably

Engineering Contradiction:

Improvetable top length adjustmentVSAvoidtable structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The table top is divided into multiple segments: fixed table top portions and movable table top portions that can slide independently along the frame rails. This segmentation allows the table top length to be adjusted without requiring a completely complex extendable mechanism, as each segment can move separately to achieve different configurations.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The movable table top portions are designed to nest within or alongside the fixed table top portions when retracted, similar to nested dolls. This nesting arrangement allows the extended portions to be stored compactly when not in use, reducing the overall complexity of the extendable mechanism while maintaining the ability to extend the table top when needed.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Adaptability or versatility

If extendable table top features are added to allow the table top to be extended or retracted to different lengths, then the adaptability of the table is improved, but the weight of the table increases considerably

Engineering Contradiction:

Improvetable top length adjustmentVSAvoidtable weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The table top transitions from a static, fixed-length structure to a dynamic, adjustable-length structure. The movable table top portions can slide along the frame rails to extend or retract, allowing the table to adapt its length dynamically based on usage needs. This dynamic design achieves adaptability without requiring heavy, complex mechanical extension mechanisms.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If extendable table top features are added to allow the table top to be extended or retracted to different lengths, then the adaptability of the table is improved, but the cost of the table increases considerably

Engineering Contradiction:

Improvetable top length adjustmentVSAvoidtable manufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The movable table top portions are designed to be similar in structure and material to the fixed table top portions, essentially creating a simplified copy that can slide along the frame. This copying approach allows for standardized manufacturing processes and materials, reducing the overall cost of implementing the extendable feature while maintaining visual and functional consistency.

Inventive Principle:

Principle #26Copying

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution allows the table to be easily adjusted between retracted and extended configurations, maintaining a lightweight and cost-effective structure while accommodating various tasks, with the ability to fold for storage and expand for increased length.

Implementation Method 1

The inner sliding tracks of the first and second table tops are slidingly received within the outer sliding tracks so that the first and second table tops are slidingly movable between a retracted position and an extended position

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS20170119146A1Table With Extendable Top

Publication Date: 2017.05.04 ZHUHAI SHICHANG METALS

AI summary

An extendable table movable between an extended position and a retracted position is disclosed. The table includes a generally rectangular table frame, outer sliding tracks secured to the rails of the table frame, first and second cross members also secured to the rails of the table frame, as well as four table legs. The table includes first and second movable table tops, each having a molded plastic table top surface, and inner sliding tracks which are slidingly received within the outer sliding tracks so that the first and second table tops are movable between a retracted position and an extended position. The table includes a leaf, having a molded plastic table top surface and first and second retainers disposed on an underside of the table leaf. The table leaf is movable from a storage position, in which the table leaf rests on the cross members beneath the sliding table tops, and a use position, in which the table leaf retainers are fitted over and mated with portions of the first and second cross members so that the table leaf top surface is aligned between and substantially coplanar with the first and second sliding table tops.